Stove.



L. A. KNOWLES.

STOVE.

APPLICATION FILED MAR.19, 1913.

1 085,74 0. Patented Feb. 3, 1914.

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STOVE.

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L. A. KNOWLES.

STOVE.

APPLICATION FILED MAR. 19, 1913.

1,085,740. Patented Feb. 3, 1914.

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UNITED STATES PATENT UFFICE.

LATHAM A. KNOWLES, 0F VIENNA, ILLINOIS, ASSIGNOR 0F ONE-HALF T0 OTIS E. HARVICK, OF VIENNA, ILLINOIS.

STOVE.

Specification of Letters Patent.

Patented Feb. 3, 1914.

Application filed March 19, 1913. Serial No. 755,565.

To all whom it may concern:

Be it known that I, LATHAM A. KNowLns, a citizen of the United States, residing at Vienna, in the county of Johnson and State of Illinois, have invented certain new and useful Improvements in Stoves, of which the following is a specification.

The present invention relates to stoves, and has for its purpose to provide a novel form of stove adapted for burning either wood or coal, and provided with means operable to regulate the draft in accordance with the particular fuel being used to the end of recovering the maximum heating efficiency ofsuch fuel.

The invention has for its further purpose to provide a stove of the type in question so constructed as to be substantially air tight throughout, excepting for the means provided to admit the necessary air for supporting combustion.

The invention further proposes to construct a stove along the lines above indicated which will be of neat and compact design; one which may be readily transported without requiring to be disassembled; and one whose cost of manufacture will be comparatively small.

l/Vith these and other objects in view the invention consists in the novel details of construction and combination of parts more fully hereinafter described and particularly pointed out in the claims.

Referring to the drawings, forming a part of this specification, in which like figures designate like parts in the several views, Figure 1 is a front elevational view of the stove; Fig. 2 is a central vertical sectional view of the same; Fig. 3 is a central vertical sectional view taken at right angles to Fig. 2; Fig. 4 is a horizontal transverse sectional view taken on the line 44 of Fig. 3 as viewed in the direction of the arrows; Fig. 5 is a horizontal transverse sectional view taken on the line 5+5 of Fig. 3; Fig. 6 is a 7 detail view in vertical section of the draft regulator taken on the line 66 ofFig. 7 and Fig. 7. is a top plan view of the same taken on the line 77 of Fig. 6.

Referring to the construction in detail, the stove consists of a lower section 1 having a reduced portion 2 to receive the upper section 3 that is supported on the lower section. The section 1 provides the fire box 4 and an ash pit 5, within the latter of which is contained an ash pan or other receptacle 6. The receptacle 6 is placed in position or removed therefrom through an opening 7 that is normally closed by a door 8 hinged to the lower section at 9 and 10 (see Figs. 1, 2 and 4).

The fire box consists of the shell 11 that is supported in position through the medium of its annular flange l2 resting upon the annular ledge 13 of the casing section 1. Said shell 11 is of inverted truncated conical designp and at its lower portion fits through the opening provided bv the annular flange 14 formed integral with the casing section 1 just above the ash chamber 5, and the shell 11 provides an annular air space 15 with the wall of the casing 1 adapted to receive air through the flue or pipe 16 in a manner to be hereinafter explained.

A grate 17 is mounted to oscillate on a shaft 18 that is, in turn, journaled in suitable bearings 19 and 20 in the shell 11 and in the wall of the casing section 1. The grate 17 is adapted to be oscillated through the medium of the usual shaking bar by a socket piece 21 (see Figs. 2 and 4) secured beneath the grate and within which said shaking bar fits. The grate is normally in that position indicated in Fig. 4, and to the end that the shaking bar may be readily fitted within the socket piece 21, there is provided a guide 22 of suitable design that is in alinementwith said member 21 whereby to guide the bar which is fitted through an opening 23 of a plate 24. The plate 24 is mounted to slide in a suitable recess 25 formed on the inner face of the door 8 to the end that there will be no opening while the grate is being shaken and thus prevent the escape of dust or gases. The opening 23 of the sliding plate 24 is normally closed through the medium of a blind consisting of a plate 26 that is pivotally mounted on the door 8 at 27. The grate is adapted to be tilted for dumping through the medium of a lever 28 that is secured to the outer end of the bar or shaft 18. Said lever 28 is swingingly mounted on a pin 29 on the shaft 20 to the end that said lever may be swung or moved free of the stop 30 by which said lever is normally held, as indicated in Figs. 1, 3, 4 and 5.

The flue or pipe 16, through which the air is admitted into the annular air space 15, consists of telescoping sections 31 and 32 to the top of the former of which is secured a hood 33 having an air regulating valve 34 constructed and adapted to operate in accordance with that type of draft regulator disclosed in my co-pending application for U. S. Patent, Serial No. 742,854, filed J anuary 18th, 1913. The lower flue section 32 is constructed with an elbow 35 that enters the ash chamber 5, and said elbow is formed with a ledge or guard plate 36 that overlies the ash receptacle 6 for obvious reasons. The section 32 of the flue is also provided with a draft regulator for directing the incoming air to a point below the grate 17 or above the grate accordingly as wood or coal is being used in the stove. Said draft regulator consists of a damper comprising a plate 37 rigidly secured within the flue section 32, and a similar plate 38, hingedly connected to said plate 37 and adapted to be moved into either of the positions shown in Fig. 6. When in the full line position indicated (in Fig. 6) the incoming air is directed into the annular air space 15 proper through the medium of a pipe 39 that leads from the flue 16 through the shell 11 and into the annular air space 15. \Vhen the plate 38 is moved into the dotted line position shown in Fig. 6, and in full line position shown in Fig. 3, the incoming air is directed through the whole length of the flue 16, through the elbow into the ash pit, and from the ash pit the air passes upwardly through the grate in the known manner. The plate 38 is adapted to be actuated through the medium of the usual means employed for controlling a damper of this character. The flue 16 is further provided with a pipe 40 that directs the air from the flue into the air chamber 15 that surrounds the shell 11 of the fire box, and from said air chamber 15 the air is directed to be distributed above the grate by the pipe or flue 41 (see Figs. 2 and 3). Said pipe 41 is fitted with a sleeve 42 that is adjustably mounted on said pipe 41 by means of a screw 43 designed to enter the notch 44, (see Fig. 2). There may be provided a plurality of such notches whereby to permit of a variety of adjustments for the member 42. The pipe 40 is provided with a valve or damper 45 hingedly mounted to the flue at 46, and which has for its purpose to close the passage through the pipe 40 when the air is being directed below the fire grate, or to rest upon the valve seat or support 47 when the air is to be directed through the flue 40 into the chamber 15. Said damper 45 is adapted to be actuated through the medium of a lever 45 that is pivo-tally mounted at 46 on the flue and designed to engage with a notched bar 47 for holding said damper in different positions. The flue 40 is further provided with veins or bafiies 48 for distributing the air to either side of the chamber 15 as the air enters said chamber.

The top 49 of the stove is secured to the upper section in any approved manner, and is provided with supporting members or ledges 50 adapted for holding kettles or the like when it is desired to heat water. j The hood 49 is further provided with a ridge or flange 51 of arcuate design which, in addition to serving as a reinforcing element, provides a baflie. The outlet flue 52 is mounted on the top 49 and is designed to carry off the products of combustion in the usual manner.

It is obvious that those skilled in the art I may vary the details of construction and arrangement of parts, without departing from the spirit of my invention, and therefore I do not wish to be limited to such features except as may be required by the claims;

It may be further stated that the grate is provided with a plurality of projections or spurs m of pyramidal or other design adapted to serve as agitators for loosening the ash of the fuel when the grate is shaken.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is:

1. A stove comprising a casing, a fire box located within and spaced from the said casing and forming therewith an air chamber surrounding the fire box, a grate mounted within the fire box, an ash pit arranged beneath the said fire box and within the casing, an air inlet conduit located outside of the casing, and having communication with said ash pit; a connection leading from said inlet conduit and having communication with the said fire box, a damper for regulating the admission of air into said fire box, a second connection leading from the inlet conduit into and having communication with the said air chamber surrounding the fire box, a damper for controlling the admission of air into said air chamber and a pipe extendingdownwardly from the upper edge of said fire box to a point above the grate and establishing communication between the said air chamber and fire box.

2. A stove comprising acasing, a fire box located within and spaced from the said casmg and forming therewith an air chamber surrounding the fire box, a grate mounted within the fire box, an ash pit arranged beneath the said fire box and within the casing, an air inlet conduit located outside of the casing and having communicationwith said ash pit; a connection leading from said inlet conduit and having communication with the said fire box, a damper for regulating the admission of air into said firebox, a second connection leading from the inlet conduit into and having communication 1313 with the said air chamber surrounding the fire In testimony whereof I afiix my signature box, a damper for controlling the admission in presence of two Witnesses. of air into said air chamber and an adjustable pipe extending downwardly from the LATHAM KNOWLES 5 upper edge of said fire box to a point above Witnesses:

the grate and establishing communication W. THEO. BnNsEN,

between the said air chamber and fire box. H. H. BYRNE.

Copies of thin patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

